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Site Background <br /> Canepa's Car Wash,Park Street <br /> Page 6 of 6 <br />. constituents were not detected at or above laboratory reported detection limits in those samples BTEX <br /> constituents were detected at low concentrations in the samples collected from MW-1 and MW-3, at <br /> moderate concentrations in the sample collected from MW-2, and at relatively elevated concentrations in <br /> the sample from MW-5 TPH-G was detected in MW-2, MW-3, and MW-5, at concentrations of 6 S, <br /> 0 067, and 40 mg/L, respectively <br /> Initial EPA Method 8020 analyses indicated that MTBE was detected in the groundwater sample <br /> collected from MW-1, MW-2, MW-3, MW-5, and MW-6 at concentrations of 8 7 µg/L, 28,000 µg/L, 100 <br /> µg/L, 32,000 gg/L, and 32 pg/L, respectively MTBE was not detected at or above a detection limit of 5 0 <br /> pg/L in the groundwater samples collected from MW-4 and MW-7 Because the results for the MW-2, <br /> MW-3, MW-5, and MW-6 samples were inconsistent with historic results, the samples were reanalyzed <br /> for MTBE by EPA Method 8260B The results of the EPA Method 8260B analyses indicated that MTBE <br /> was not detected in the samples from MW-2 and MW-5 at or above the laboratory reported detection <br /> limits of 5 0 and 50, Eig/L, respectively MTBE was detected in the groundwater samples collected from <br /> MW-3 and MW-6 at concentrations of 2 6 pg/L and 5 2 gg/L, respectively The final laboratory analytical <br /> results of the groundwater samples collected on July 14, 2004 were generally consistent with historic <br /> monitoring results <br /> The groundwater table remained above the top of all well screens during the July 2004 monitoring event <br /> The average depth to groundwater in the monitor wells was approximately 27 91 feet below the surveyed <br /> well collar measuring points on July 14, 2004, 0 61 foot deeper than the previous quarter The <br /> groundwater elevation contours indicated that the groundwater gradient was generally in a northerly <br /> direction, consistent with historic groundwater gradients <br /> P 12000,pg12038 Canepa Park12038 Canepa Park\Quarterly Monitonng Reports12004 October\Site Background 10-2004 doc <br />